Reviews and reputation · Panel-data econometric study of review volume, ratings, and sales with product/time controls.
Do Online Reviews Matter? An Empirical Investigation of Panel Data
Wenjing Duan, Bin Gu, Andrew B. Whinston (2008). Do Online Reviews Matter? An Empirical Investigation of Panel Data. Decision Support Systems. https://doi.org/10.1016/j.dss.2008.04.001.
Plain-English take
Review volume is positively associated with box-office demand, while the relationship between review valence and sales is more nuanced; review activity can be a demand signal as well as influence. For your marketing: Use it as a behavioral mechanism or experiment-design reference, not a direct forecast for a SaaS funnel.
How much weight to give this
3/5 Moderate evidence for a specific setting
The 1–5 evidence-check score is a practical reading aid, not a formal peer review or a probability that a conclusion is true. It combines design strength (2 points), sample reporting (1), comparison/control clarity (1), and how much of the paper could be checked (1). Access affects how confidently this directory can assess a study, not the study's underlying quality. Blinding is reported separately because it is not relevant to every design.
Panel-data econometric study of review volume, ratings, and sales with product/time controls.
Movie-market panel data linking online reviews and movie box-office performance over time.
Judged from the publisher-described design and comparison; consult the paper for complete analysis.
Publisher page and abstract were retrieved directly; full text was not assumed open.
Double-blind? Blinding was not established from the retrieved publisher record.
Research question
What the authors investigated
Do online review volume and ratings affect sales, and how should firms interpret review metrics?
Design
Panel-data econometric study of review volume, ratings, and sales with product/time controls.
Sample and setting
Movie-market panel data linking online reviews and movie box-office performance over time.
Reported result
What the study found
Review volume is positively associated with box-office demand, while the relationship between review valence and sales is more nuanced; review activity can be a demand signal as well as influence.
This is a paraphrase of the source. Check the original paper for definitions, estimates, statistical uncertainty and analysis details.
Scope and transfer
Limitations to keep in view
Movie releases are a special high-information-good context; panel observational estimates cannot fully rule out unobserved publicity or reverse causality.
Possible founder application
Use it as a behavioral mechanism or experiment-design reference, not a direct forecast for a SaaS funnel.
Evidence access
Publisher record and abstract retrieved; consult the linked paper for full methods and tables.
ScienceDirect result identifies the article as an empirical panel-data investigation; the accessible paper reports movie panel variables and estimation. Direct publisher-page retrieval was recorded on 2026-10-09; this profile uses publisher metadata/abstract and does not claim independent review of unavailable full text.
If only an abstract or metadata was available, the profile is limited to claims supported there. A paper's paywall does not change its evidentiary status, but it limits what we can substantiate from accessible text.